[inference/model]Adapted to the baichuan2-7B model (#5591)

* Adapted to the baichuan2-7B model

* modified according to the review comments.

* Modified the method of obtaining random weights.

* modified according to the review comments.

* change mlp layewr 'NOTE'

colossalai/inference/modeling/policy/__init__.py

@@ -1,9 +1,16 @@
 from .glide_llama import GlideLlamaModelPolicy
+from .nopadding_baichuan import NoPaddingBaichuanModelInferPolicy
 from .nopadding_llama import NoPaddingLlamaModelInferPolicy
 
 model_policy_map = {
     "nopadding_llama": NoPaddingLlamaModelInferPolicy,
+    "nopadding_baichuan": NoPaddingBaichuanModelInferPolicy,
     "glide_llama": GlideLlamaModelPolicy,
 }
 
-__all__ = ["NoPaddingLlamaModelInferPolicy", "GlideLlamaModelPolicy", "model_polic_map"]
+__all__ = [
+    "NoPaddingLlamaModelInferPolicy",
+    "NoPaddingBaichuanModelInferPolicy",
+    "GlideLlamaModelPolicy",
+    "model_polic_map",
+]